CN101154417A - Storage apparatus, storage apparatus control method, and control apparatus - Google Patents
Storage apparatus, storage apparatus control method, and control apparatus Download PDFInfo
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- CN101154417A CN101154417A CNA2007101038241A CN200710103824A CN101154417A CN 101154417 A CN101154417 A CN 101154417A CN A2007101038241 A CNA2007101038241 A CN A2007101038241A CN 200710103824 A CN200710103824 A CN 200710103824A CN 101154417 A CN101154417 A CN 101154417A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10629—Data buffering arrangements, e.g. recording or playback buffers the buffer having a specific structure
- G11B2020/10666—Ring buffers, e.g. buffers wherein an iteratively progressing read or write pointer moves back to the beginning of the buffer when reaching the last storage cell
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10675—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control
- G11B2020/10694—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control output interface, i.e. the way data leave the buffer, e.g. by adjusting the clock rate
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/1075—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data
- G11B2020/10759—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data content data
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2508—Magnetic discs
- G11B2220/2516—Hard disks
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
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Abstract
There is provided a storage apparatus capable of reducing command processing time, a control method of the storage apparatus, and a control apparatus thereof. A storage apparatus is capable of receiving a write request from an external device, comprising: an FMT position counter 51 that measures a first measurement value concerning the head position on a track of a recording medium; a data reception counter 41 that measures a second measurement value concerning the received data amount of write request data which is data included in the write request from the external device, and a sequential controller 52 that controls data writing operation for the track based on the first and second measurement values measured respectively by the FMT position counter 51 and data reception counter 41.
Description
Technical field
The present invention relates to based on the memory storage that instruction writes at medium that writes that sends from external unit, the control method of described memory storage and control device thereof.
Background technology
Routinely, in the memory storage such as HDD (hard disk drive) or CD drive, the starting block of appointment from the write command of sending from main frame (head block) begins this write command is sequentially write on the medium.
As prior art related to the present invention, known a kind of dish device that can prevent the delay that reading order carry out to be handled and can improve the treatment effeciency of write command (data are replicated between write command) is (for example, referring to patent documentation 1: Japanese Patent Application Laid-Open 2001-209500 communique).
Yet in comprising the memory storage of rotating recording medium, writing processing when head position reaches the specified initial sector of write command could begin, and makes to be difficult to reduce command processing time.This has hindered the raising of memory storage performance.
Summary of the invention
Made the present invention and solved the problems referred to above, and target of the present invention is to provide a kind of control method and control device thereof that can reduce the memory storage of command processing time, described memory storage.
In order to address the above problem, according to a first aspect of the invention, a kind of memory storage that can receive the request that write from external unit is provided, and this memory storage comprises: first measurement section, and it measures the first relevant measured value of head position on the track with recording medium; Second measurement section, it measures second measured value relevant with the data volume that writes request msg that is received, and the said write request msg is the data that are included in from the said write request of described external unit; And control part, its described first and second measured values of measuring based on described first and second measurement section are controlled the data write operation to described track.
In memory storage according to the present invention, described first measured value represented to the data volume that current head position can write by the position from the top that will write the said write request msg on described track, and described second measured value is shown by the scale of the data that receive in the said write request msg.
In memory storage according to the present invention, under the situation of described first measured value less than described second measured value, described control part writes the said write request msg corresponding to described head position.
In memory storage according to the present invention, described data volume is represented by piece.
In memory storage according to the present invention, when determining the said write of said write request msg finished, described control part is finished at the said write processing of request to described external unit notice.
Memory storage according to the present invention also comprises: the 3rd measurement section, it measures the 3rd measured value as the piece number of having been write that writes request msg, wherein said control part will indicate described first measured value of the position that said write begins to be stored as beginning first measured value, and, fashionable when interrupting to writing of continuous blocks based on described first and second measured values, determine will write on the described recording medium the ensuing position of described data based on described the 3rd measured value of described beginning first measured value and the measurement of described the 3rd measurement section.
Also comprise the 4th measurement section according to memory storage of the present invention, it measures the 4th measured value, described the 4th measured value is the piece number that the initial beginning from the said write request msg has been write continuously, wherein under measured described the 4th measured value of described the 4th measurement section becomes the situation of piece number greater than request, described control part is determined writing of said write request msg finished, and the piece number of wherein said request is the piece number of said write request msg.
In memory storage according to the present invention, the corresponding data buffer of quantity of the piece that writes continuously that described control part release and described the 4th measurement section are measured.
Also comprise the writing information storage part according to memory storage of the present invention, its storage indication is to the information of whether having finished that writes of each piece in the said write request msg, wherein based on the described information that is stored in the said write information storage part, described control part does not carry out writing the piece that has been written into.
In memory storage according to the present invention, receive at described control device and a plurality ofly to write request and described a plurality of physical address that writes in the request is under the continuous situation, described control part will be included in described a plurality of data organization that writes in the request and be one and write request msg.
In memory storage according to the present invention, described control device finishes at the said write processing of request to described external unit notice according to described a plurality of orders that write the request that writes described in the request.
In memory storage according to the present invention, to cross under the situation of a plurality of tracks in the position that will write the said write request msg on the described recording medium, described first measurement section is striden described first measured value of described a plurality of orbit measurement.
In memory storage according to the present invention, to cross under the situation of a plurality of tracks in the position that will write the said write request msg on the described recording medium, described second measurement section is at described second measured value of each orbit measurement.
According to a second aspect of the invention, a kind of storage apparatus control method of control store device is provided, described memory storage can receive the request that writes from external unit, described storage apparatus control method comprises: measuring process, the second relevant measured value of the data volume that writes request msg that it is measured the first relevant measured value of head position on the track with recording medium and measurement and is received, the said write request msg is the data that are included in from the said write request of described external unit; And controlled step, it controls data write operation to described track based on measured described first and second measured values of described measuring process.
According to a third aspect of the invention we, provide a kind of to receiving the control device that the storage medium of the request that writes is controlled from external unit, described control device comprises: first measurement section, and it measures the first relevant measured value of head position on the track with recording medium; Second measurement section, it measures second measured value relevant with the data volume that writes request msg that is received, and the said write request msg is the data that are included in from the said write request of described external unit; And control part, its described first and second measured values of measuring based on described first and second measurement section are controlled the data write operation to described track.
According to the present invention, can reduce and carry out the required time of command process.
Description of drawings
Fig. 1 is the block diagram that illustrates according to the example of the structure of the disc driver of first embodiment;
Fig. 2 is the block diagram that illustrates according to the example of the structure of the disk controller of first embodiment;
Fig. 3 is the process flow diagram that the example of the operation of handling according to the write command of first embodiment is shown;
Fig. 4 is the block diagram that illustrates according to the example of the structure of the disk controller of second embodiment;
Fig. 5 is the process flow diagram that the example of the operation of handling according to the write command of second embodiment is shown;
Fig. 6 illustrates the process flow diagram that upgrades the example of the operation of handling according to the state counter of second embodiment;
Fig. 7 is the figure that illustrates according to the example of the table of the writing position recording portion of second embodiment;
Fig. 8 is the figure that illustrates according to the example of the bitmap (bit map) of the writing position recording portion of second embodiment;
Fig. 9 is illustrated in the concrete example of handling according to the write command of second embodiment, and in the rotation first time of dish medium, piece receives and this piece is written between the write operation of sector the figure about time relation;
Figure 10 is illustrated in the concrete example of handling according to the write command of second embodiment, and in the rotation second time of dish medium, piece receives and this piece is written between the write operation of sector the figure about time relation;
Figure 11 is illustrated in the concrete example of handling according to the write command of second embodiment, the figure of the position relation between track t and the magnetic head;
Figure 12 is illustrated in the concrete example of handling according to the write command of present embodiment the figure of the content of the table of writing position recording portion;
Figure 13 is illustrated in the concrete example of handling according to the write command of second embodiment figure of the content of the bitmap of writing position recording portion;
Figure 14 illustrates the process flow diagram that upgrades the example of the operation of handling according to the state counter of the 3rd embodiment;
Figure 15 illustrates the process flow diagram of striding the example of the operation that track (cross-track) write command handles according to first of the 4th embodiment; And
Figure 16 illustrates the process flow diagram of striding the example of the operation that the track write command handles according to second of the 4th embodiment.
Embodiment
Embodiments of the invention are described below with reference to accompanying drawings.
＜the first embodiment 〉
With the structure of describing according to the disc driver (memory storage) of first embodiment of the invention.
Fig. 1 is the block diagram that illustrates according to the example of the structure of the disc driver of present embodiment.This disc driver comprises microprocessor 11, disk controller 12, data buffer 13, motor driver controller 14, head position controller 15, read/write controller 16, spindle motor 21, actuator 22, magnetic head 23 and dish medium 24.
Fig. 2 is the block diagram that illustrates according to the example of the structure of the disk controller 12 of present embodiment.Disk controller 12 comprises I/F (interface) controller 31, data buffer management department 32 and FMT 33 (disk formatting device).Data buffer management department 32 comprises Data Receiving counter 41 and data flow control 42.FMT 33 comprises FMT location counter 51, sequence controller 52, writes beginning FMT location counter 55 and has write block counter 56.
FMT 33 will be converted to the FMT position and be used for physical address on the dish medium 24 that fill order handles from the specified LBA of the order of higher level equipment (LBA (Logical Block Addressing)), and described FMT position is the logical address that is in by in the scope of this order appointment.
Interface between I/F controller 31 control higher level equipments and the disk drive.Data Receiving counter 41 be used to be illustrated in that the write command time of reception receives from main frame, be the counter of the data volume of unit with the piece.FMT location counter 51 is the counters that are used for current head position is expressed as the FMT position, and described FMT position is the logical address that begins from initial sector in the request that the writes scope of write command appointment.Notice that piece is corresponding to the sector.Data flow control 42 carries out current control, for example to the control of data buffer zone 13 (buffer circle).Sequence controller 52 carries out command process control.
Write the value of the FMT location counter 51 that the 55 storage write operations of beginning FMT location counter have begun.Write block counter 56 and be the counter of the sector number that the expression write operation finished.
Next, will the operation of handling when the write command of being carried out be described when main frame receives write command.
The piece number of supposing in write command to be asked is a request block.Fig. 3 is the process flow diagram that the example of the operation of handling according to the write command of present embodiment is shown.The value initialization that sequence controller 52 will write beginning FMT location counter 55 is-1, and the value initialization that will write block counter 56 simultaneously is 0 (S41).Sequence controller 52 determines whether current head position is initial sector subsequently.At current head position is not that flow process is returned step S42 under the situation of initial sector ("No" among the S42), and is that flow process advances to next step under the situation of initial sector ("Yes" among the step S42) at current head position.Whether the value of sequence controller 52 specified data count pick up devices 41 is greater than the value (S43) of FMT location counter 51 subsequently.
Be not more than under the situation of value of FMT location counter 51 ("No" among the S43) in the value of Data Receiving counter 41, the value that sequence controller 52 determines to write beginning FMT location counter 55 is-1.Writing beginning FMT location counter 55 is under-1 the situation ("Yes" among the S44), flow process is returned step S42, and not being ("No" among the S44) under-1 the situation in the value that writes beginning FMT location counter 55, processing finishes continuously, and this flow process end thus.
Be treated to such processing continuously, promptly continue to write from as with write corresponding of beginning FMT position write a plurality of that begin block begins.Under the situation that continues the processing end, need carry out not writing the write operation of piece, the described piece of not writing is in writing the request scope and not by continuing to handle the piece that writes.Because the scope of write-in block can be pointed out by value that writes beginning FMT location counter 55 and the value of having write block counter 56, specify the begin block of not writing in the piece so sequence controller 52 head position after continuing the processing end reaches the time point of initial sector next time, and carry out not writing the write operation of piece.In addition, sequence controller 52 meets or exceeds the time point of the piece number of being asked to host notification write command completion status in the value of writing piece 56.
Under the situation of value greater than the value of FMT location counter 51 of Data Receiving counter 41 ("Yes" among the S43), sequence controller 52 is determined to write whether the value that begins FMT location counter 55 is-1.Writing beginning FMT location counter 55 is not that flow process turns to step S47 under-1 the situation ("No" among the S45), and is ("Yes" among the S45) under-1 the situation writing beginning FMT location counter 55, and flow process advances to next step.Subsequently, sequence controller 52 is provided with the value (S46) that writes beginning FMT location counter 55 in FMT location counter 51.
Subsequently, sequence controller 52 carries out single sectors process (one-sector processing), carrying out the write operation (S47) corresponding to a sector, and determines whether normally to have carried out single sectors process.Under the situation of also normally not carrying out single sectors process ("No" among the S48), this flow process abnormal ending, and under the situation of normally having carried out single sectors process ("Yes" among the S48), this flow process advances to next step.Sequence controller 52 increases progressively the value of writing block counter 56 subsequently, and determines whether to have finished the processing (value of whether having write piece 56 has reached the piece number of being asked) to the piece number of being asked.Under to the also uncompleted situation of processing of the piece number of being asked ("No" among the S49), flow process is returned step S42, and under the situation that this processing has been finished ("Yes" among the S49), flow process normally finishes.
According to present embodiment, when data are written into order when receiving, the BOB(beginning of block) that can be write immediately among received a plurality of is carried out write operation, reduces command processing time thus.In addition, write the starting position and write the quantity of piece by storage, the piece that only writes when head position arrives the initial sector that writes in the request scope next time and need not waits for that head position is possible through finishing command process under the situation that writes last sector in the request scope, reduces command processing time thus.
＜the second embodiment 〉
In a second embodiment, will describe the disc driver of recorded information, whether the piece that described information indication writes in the request scope is written into.
Disc driver according to present embodiment has and the structure identical according to the disc driver of first embodiment.
Next the structure of disk controller 12 will be described.
Fig. 4 is the block diagram that illustrates according to the example of the structure of the disk controller 12 of present embodiment.In Fig. 4,, and will omit description here to it with identical or corresponding part among the representative of label identical among Fig. 2 and Fig. 2.The places different with Fig. 2 are, provide state counter 53 and writing position recording portion 54 to substitute and have write beginning FMT location counter 55 and write block counter 56.
Writing position recording portion 54 record is by piece that has been written among a plurality of in the request that the writes scope of write command appointment or the piece that also is not written into.State counter 53 is counters of representing to write from the continuous data that initial sector begins to count the quantity of sector.Therefore, when the value of state counter 53 meets or exceeds request block quantity (the piece number of being asked that write command is specified), finish corresponding to this write command processing that writes request.In addition, the value representation of state counter 53 amount (piece number) that can from scope, discharge by the data buffer 13 that write command guaranteed.Data flow control 42 carries out current control according to the value of state counter 53, for example discharges data buffer 13.
Next the operation that write command is handled will be described.
Fig. 5 is the process flow diagram that the example of the operation of handling according to the write command of present embodiment is shown.Disk controller 12 initialization writing position recording portion 54 (S51).Subsequently, disk controller 12 determines whether current head position indicates initial sector.Do not indicate under the situation of initial sector ("No" among the S52) at current head position, flow process is returned step S52, and under the situation of current head position indication initial sector ("Yes" among the S52), flow process advances to next step.Subsequently, whether the value of disk controller 12 specified data count pick up devices 41 is greater than the value of FMT location counter 51.Be not more than under the situation of value of FMT location counter 51 ("No" among the S53) in the value of Data Receiving counter 41, flow process is returned step S52, and under the situation of value greater than the value of FMT location counter 51 of Data Receiving counter 41 ("Yes" among the S53), flow process advances to next step.
Subsequently, disk controller 12 inquiry writing position recording portion 54 determine whether current sector is that data are not write the sector.In current sector is not that data are not write under the situation of sector ("No" among the S54), and flow process is returned step S52, and is that data are not write under the situation of sector ("Yes" among the S54) in current sector, and flow process advances to next step.Subsequently, disk controller 12 determines whether current sector is that data have been write the sector, correspondingly upgrades the content (S55) of writing position recording portion 54, and carries out single sectors process, to carry out the write operation (S56) corresponding to a sector.After this, disk controller 12 determines whether single sectors process normally carries out.Under the situation of normally not carrying out single sectors process ("No" among the S57), this flow process finishes singularly, and under the situation that single sectors process has normally been carried out ("Yes" among the S57), flow process advances to next step.
Next will describe state counter and upgrade the details of handling.
In the zero hour that write command is handled, the value of state counter 53 is initialized to 0.The piece number of being asked is set to experimental request block number.Fig. 6 illustrates the process flow diagram that upgrades the example of the operation of handling according to the state counter of present embodiment.Disk controller 12 determines whether there was not the sector (S61) that will write data before current sector.
Under the situation that has any sector that will write data ("No" among the S61), disk controller 12 determines whether to have finished the write operation at back to back previous sector.Under the also uncompleted situation of said write operation ("No" among the S62), this flow process finishes, and under the situation that the said write operation has been finished ("Yes" among the S62), this flow process turns to step S63.
Under the situation that does not have the sector that will write data ("Yes" among the S61), disk controller 12 increases progressively the value (S63) of state counter 53.Disk controller 12 determines whether finish at the write operation of back to back next sector subsequently.Under the also uncompleted situation of said write operation ("No" among the S64), this flow process finishes, and under the situation that the said write operation has been finished ("Yes" among the S64), this flow process advances to next step.Disk controller 12 increases progressively the value (S65) of state counter 53 subsequently.
Subsequently, disk controller 12 determines whether to satisfy " value of state counter 53＜experimental request block number ".Under the ungratified situation of above-mentioned condition ("No" among the S66), flow process is returned step S64, and under the situation that above-mentioned condition satisfies ("Yes" among the S66), disk controller 12 is to host notification write command completion status, and this flow process finishes.
Next the details of writing position recording portion 54 will be described.Adopt the situation of the form of showing and the situation that the writing position recording portion adopts the form of bitmap with describing writing position recording portion 54 here.
At first, be to write down four situations of not writing the table of piece of as many as with describing writing position recording portion 54, the described piece of not writing is the piece that also is not written into that writes in the request scope.In step S51, the request scope of writing is recorded in the table as not writing the piece scope, and that other pieces are initialized to is invalid.Fig. 7 is the figure that illustrates according to the example of the table of the writing position recording portion of present embodiment.In this table, sequentially with FMT position (FmtCnt)=3 and 4.Therefore, scope " FMT position≤2 " (FMT position=since 02 pieces) and " FMT position 〉=5 " (FMT position=since 54 pieces) is recorded in the table as not writing piece.
Next, will describe writing position recording portion 54 is to write down the situation of bitmap that each piece of indication has been write (1) or also do not write the position (bit) of (0).At step S51, all positions are both initialized to 0.Fig. 8 is the figure that illustrates according to the example of the bitmap of the writing position recording portion of present embodiment.In this bitmap, sequentially write FMT position (FmtCnt)=3 and 4.Therefore, only the position of 3 and 4 FMT position is recorded as 1.
Next, will the concrete example that write command is handled be described.
Suppose dish medium 24 urgent be connected on head position before the Data Receiving through moment of FMT position=0 begin rotate to be rotation for the first time, and suppose the ensuing rotation for the second time that rotates to be.Fig. 9 is illustrated in the concrete example of handling according to the write command of present embodiment, and in rotation for the first time, piece receives and piece is written between the writing of sector figure about time relation.Figure 10 is illustrated in the concrete example of handling according to the write command of present embodiment, and in rotation for the second time, piece receives and piece is written between the writing of sector figure about time relation.
In each of Fig. 9 and 10, transverse axis is represented the time.The rectangle by " data x " mark of each top is represented from the data block of main frame reception.The position of piece is corresponding to the time that receives this piece, and increase from left to right.The value of the numerical value representative data count pick up device 41 that provides at the time point place that the reception of each piece has been finished.The rectangle by " sector x (Sct x) " mark of each below is represented the sector.The position of sector is corresponding to physical address, and increase from left to right.The value of the numeric representation FMT location counter 51 that provides at the top of each sector.The arrow of below, sector is represented the write operation scope.Rectangle by " sector slips over (Sct Slip) " mark is represented the sector of not carrying out write operation.X represents physical address.In this example, be n to n+6 and n+9 to n+10 corresponding to the physical address that writes the request scope.
In rotation for the first time, when beginning from host receiving data, disk controller 12 is initialized as 0 with activation data count pick up device 41 with Data Receiving counter 41, and initial sector is set to 0 to activate FMT location counter 51 (S30).When with the piece being unit reception data, the value of Data Receiving counter 41 incremental data count pick up devices 41.After this, in that (this moment, data n+3 just were received at the magnetic head time point place that (on-track) control (tracking) has been finished to the track t rail of (comprising that physical address n is to n+10), and head position is in the central authorities of Sct n+2), disk controller 12 compares (S31) with the value of Data Receiving counter 41 and the value of FMT location counter 51.At this moment, because the value of Data Receiving counter 41 is greater than the value (Data Receiving counter=3, FMT location counter=2) of FMT location counter 51, so disk controller 12 beginnings are at the sectors of data write operation (S32) that begins from next Sct n+3.
After this, at the time point place that has finished at the write operation of Sct n+4, disk controller 12 compares the value of Data Receiving counter 41 and the value of FMT location counter 51.At this moment, because the value of Data Receiving counter 41 is not more than value (Data Receiving counter=5 of FMT location counter 51, FMT location counter=5), also be not received, and wait for and do not carry out data write operation so disk controller 12 is determined the data that will write.Afterwards, all finish and head position has reached the time point place at the top of Sct n+9 comprising until the reception of all data of data n+10, the value of Data Receiving counter 41 becomes greater than the value of FMT location counter 51 (Data Receiving counter=0, FMT location counter=7), so disk controller 12 beginnings are at the write operation that begins from next Sct n+9 (S33) up to the sectors of data of Sct n+10, described Sct n+10 is last sector that writes in the request scope.
In rotation for the second time, arrived the time point place at the top of Sct n at head position, the value of Data Receiving counter 41 is greater than value (Data Receiving counter=9 of FMT location counter 51, FMT location counter=0), thus disk controller 12 beginning at from the write operation of next Sct n (S34) up to sectors of data Sct n+2, that data also do not write.Because data have been write the sector and have been begun continuously from initial sector at the moment, thus the value of state counter 53 update mode counters 53, and data flow control 42 discharges such amount with the memory field of data buffer 13, and described amount equals the value of state counter 53.
Afterwards, reached the time point place at the top of Sct n at head position, the value of Data Receiving counter 41 is greater than value (Data Receiving counter=9 of FMT location counter 51, FMT location counter=5), so disk controller 12 beginning is at from the write operation of next Sct n+5 (S35) up to sectors of data Sctn+ 6, that data also do not write, and to host notification write command completion status (S36).
Figure 11 is illustrated in the concrete example of handling according to the write command of present embodiment, the figure of the position relation between track t and the magnetic head.This diagram shows the position relation between example middle orbit t shown in superincumbent Fig. 9 and 10 and the magnetic head.Great circle is represented track t.Head position is counterclockwise to move about dish medium 24.Step S31 shown in Figure 11, S32, S33, S34 and S35 are identical processing with shown in Fig. 9 and 10 those.
Figure 12 is illustrated in the concrete example of handling according to the write command of present embodiment the figure of the content of the table of writing position recording portion.This diagram shows the content at the table at the time point place of the step S31 of Fig. 9 and 10, S32, S33, S34 and S35.The value of the digitized representation state counter 53 on each table right side.At the time point place of step S31, from the FMT position=0 m the piece (corresponding to the whole request scope that writes) that begins is initialized to and do not write the piece scope, and the value of state counter 53 is initialized to 0.M is institute's request block number.
At the time point place that step S32 finishes, data have been written into FMT position=3 and 4, and do not write the piece scope and are updated to from the FMT position=3 pieces of 0 beginning and from the FMT position=m pieces of 5 beginnings.Then, at the time point place that step S33 finishes, data have been written into FMT position=7 and 8, and do not write the piece scope and are updated to from the FMT position=3 pieces of 0 beginning, from the FMT position=2 pieces of 5 beginnings and from the FMT position=0 piece of 7 beginnings.
At the time point place that step S34 finishes, data have been written into FMT position=0,1 and 2, and do not write the piece scope and are updated to from the FMT position=0 piece of 0 beginning, from the FMT position=2 pieces of 5 beginnings and from the FMT position=0 piece of 7 beginnings.At this moment, data have been written in all the FMT positions before FMT position=5, so the value of state counter 53 becomes 5.Then, at the time point place that step S35 finishes, data have been written into FMT position=5 and 6, and do not write the piece scope and are updated to from the FMT position=0 piece of 0 beginning, from the FMT position=0 piece of 5 beginnings and from the FMT position=0 piece of 7 beginnings.At this moment, data have been written in all the FMT positions before FMT position=9, so the value of state counter 53 becomes 9, and notice write command completion status.
Figure 13 is illustrated in the concrete example of handling according to the write command of present embodiment the figure of the content of the bitmap of writing position recording portion.This diagram shows the content in the time point place of the step S31 of Fig. 9 and 10, S32, S33, S34 and S35 bitmap.At the time point place of step S31, FMT position 0 to 9 (corresponding to the whole request scope that writes) is initialized to " 0 (not writing) ", and the value of state counter 53 is initialized to 0.
At the time point place that step S32 finishes, FMT position=3 and 4 are updated to " 1 (writing) ".Afterwards, at the time point place that step S33 finishes, FMT position=7 and 8 are updated to " 1 (writing) ".Afterwards, at the time point place that step S34 finishes, FMT position=0,1 and 2 is updated to " 1 (writing) ".At this moment, all the FMT positions before FMT position=5 become 1 (writing), so the value of state counter 53 becomes 5.Afterwards, at the time point place that step S35 finishes, FMT position=5 and 6 are updated to " 1 (writing) ".At this moment, all the FMT positions before FMT position=9 become 1 (writing), so the value of state counter 53 becomes 9, and notice write command completion status.
According to present embodiment, in writing the request scope, exist under a plurality of situations of not writing the piece scope, the sector that specific data will be written into when head position arrives the initial sector that writes in the request scope is possible, carries out write command thus effectively and handles.In addition, quantity to the piece write manages, so finish and need not to wait for that head position is possible through last sector that writes in the request scope to the host notification data write operation in moment that the data corresponding to desired number have been written into, reduced command processing time thus.In addition, even still exist after handling continuously the first time after receiving write command under a plurality of situations of not writing the piece scope, do not write piece and carry out follow-up write operation effectively thereby can specify yet.
＜the three embodiment 〉
In the third embodiment of the present invention, will the disc driver that can carry out the sequential processes of a plurality of orders effectively be described.
Have and the structure identical according to the disc driver of present embodiment and disk controller 12 according to the disc driver of second embodiment and disk controller 12.In addition, the operation of handling at the write command of a write command is with identical according to the operation of second embodiment.
About at disc driver beginning LBA and the piece number from a plurality of orders that the main frame order receives, (beginning LBA+ piece number) in an order equals under the situation of beginning LBA of next write command, promptly the LBA in two orders is under the continuous situation, determines and can apply sequential processes to these two orders.After this, can be called as " order command group " to its a plurality of orders that apply sequential processes.In sequential processes,, and it is carried out sequential processes with a plurality of in the order command group a plurality of of being considered as in the order.
Received from main frame at conventional disc driver under the situation of order command group, this disc driver begins processing after head position has arrived the initial LBA of this order command group.
In the sequential processes according to present embodiment, the BOB(beginning of block) that can be handled immediately among a plurality of of order command group is handled.In write command is handled, the piece number of being asked for the piece number of being asked in the order command group and.It is different with the operation of handling according to the state counter renewal of second embodiment that state counter upgrades the operation of handling.
Next the state counter that will describe according to present embodiment upgrades processing.
When sequential processes began, the value of state counter 53 was initialized to 0, and the piece number in the write command that will at first be handled simultaneously is set to experimental institute request block number.Figure 14 illustrates the process flow diagram that upgrades the example of the operation of handling according to the state counter of present embodiment.In Figure 14,, and will omit description here to it with identical or corresponding processing among the representative of label identical among Fig. 6 and Fig. 6.With with Fig. 6 in identical mode execution in step S61 to S67.After step S67 finished, disk controller 12 determined whether to exist next order that can apply sequential processes.Under the situation that does not have next order that can apply sequential processes ("No" among the S91), flow process finishes, and under the situation that has next order that can apply sequential processes ("Yes" among the S91), the number next to be processed (S92) after experimental institute request block number that disk controller 12 adds in the write command, and flow process is returned step S64.Promptly, under the situation that has next order that can apply sequential processes, disk controller 12 carried out at an order write command finish the notice after increase experimental institute request block number, thereby state counter 53 can continue the quantity of all pieces in the order command group is counted.
Handle according to upgrading according to the state counter of present embodiment, the BOB(beginning of block) that can be handled immediately among a plurality of of order command group is carried out described processing, reduces command processing time thus.In addition, command process can be finished and need not to wait for that head position reaches the FMT position corresponding to last piece in the order command group.In addition, because be that the process that need not to revise host computer side so only reduce command processing time is possible at each order in the order command group with LBA in sequence to the write command state notifying of main frame.
＜the four embodiment 〉
In the fourth embodiment of the present invention, the disc driver of handling effectively under the situation that writes a plurality of tracks of request range spans of order appointment will be described in.
Have and the structure identical according to the disc driver of present embodiment and disk controller 12 according to the disc driver of second embodiment and disk controller 12.In addition, the write command processing is upgraded the operation of processing with identical according to the operation of second embodiment with state counter.
The operation that the track write command is handled is striden in description, and described to stride that the track write command handles be the processing that writes the write command of a plurality of tracks of request range spans at it.Handle as striding the track write command, carry out first and second one of striding in the track write command processing according to the disk controller 12 of present embodiment.First strides the track write command handles at each orbit correction FMT location counter, and second stride the track write command and handle at each orbit correction Data Receiving counter.To at first describe first and stride track write command processing.
Figure 15 illustrates the process flow diagram of striding the example of the operation that the track write command handles according to first of present embodiment.Disk controller 12 is 0 (S71) with the value initialization of FMT location counter 51, and the initial LBA of write command appointment is converted to physical address (S73).Subsequently, the seek operation that disk controller 12 is carried out at target track, wherein said target track is the track (S74) corresponding to the physical address that is obtained by conversion.Subsequently, disk controller 12 is carried out target track and is handled (write command at target track is handled) (S75), and determines normally to have carried out this target track and handle.Under target track is handled also not by the situation of normally carrying out ("No" among the S76), flow process finishes singularly, and handles under the situation about normally having been finished ("Yes" among the S76) at target track, and flow process advances to next step.
Subsequently, disk controller 12 determines whether to finish the processing at the piece number of being asked.Under situation about having finished at the processing of the piece number of being asked ("Yes" among the S77), flow process normally finishes, and under at the also uncompleted situation of the processing of the piece number of being asked ("No" among the S77), flow process advances to next step.Subsequently, disk controller 12 is finished the value (S78) that piece number (it is the piece number that writes data in the target track) adds FMT location counter 51 to target track, specify the physical address (S79) of next target track, and flow process is returned step S74.
Stride the track write command according to first and handle, each in the value of Data Receiving counter 41 and FMT location counter 51 is all striden a plurality of tracks and continuously.Therefore, under situation about handling at the write command of a track, the value of the value of comparing data count pick up device 41 and FMT location counter 51 easily.
Next will describe second and stride track write command processing.
Figure 16 illustrates the process flow diagram of striding the example of the operation that the track write command handles according to second of present embodiment.Disk controller 12 is 0 (S81) with the value initialization of Data Receiving counter 41, begins Data Receiving (S82), and the initial LBA of write command appointment is converted to physical address (S83).Subsequently, disk controller 12 is carried out seek operation at target track, and described target track is the track (S84) corresponding to the physical address that is obtained by conversion.Subsequently, disk controller 12 is carried out target track and is handled (described processing is to handle at the write command of target track) (S85), and determines whether this target track processing is normally carried out.Under target track is handled also not by the situation of normally carrying out ("No" among the S86), flow process finishes singularly, and handles under the situation about normally having been finished ("Yes" among the S86) at target track, and flow process advances to next step.
Subsequently, disk controller 12 determines whether to have finished the processing at the piece number of being asked.Under situation about having finished at the processing of the piece number of being asked ("Yes" among the S87), flow process normally finishes, and under at the also uncompleted situation of the processing of the piece number of being asked ("No" among the S87), flow process advances to next step.Subsequently, disk controller 12 deducts target track and finishes piece number (it is the piece number that writes data in the target track) and (S88), specify the physical address (S89) of next target track from the value of Data Receiving counter 41, and flow process is returned step S84.
Stride the track write command according to second and handle, in each track, each in the value of the value of Data Receiving counter 41 and FMT location counter 51 is all since 0.Therefore, under situation about handling at the write command of a track, the value of the value of comparing data count pick up device 41 and FMT location counter 51 easily.
According to present embodiment, a plurality of tracks of range spans are asked in writing of write command, can apply write command to each track and handle, and reduce whole command processing time thus.
Although main frame has sent write command in the above-described embodiments, the present invention also can be applied to reading order and handle.
Control part is corresponding to the sequence controller among described a plurality of embodiment.First measurement section is corresponding to the FMT location counter among the embodiment.Second measurement section is corresponding to the Data Receiving counter among the embodiment.First measured value is corresponding to the FMT location counter value among the embodiment.Second measured value is corresponding to the Data Receiving Counter Value among the embodiment.The 3rd measurement section is corresponding to writing block counter among the embodiment.The 3rd measured value is corresponding to writing the block counter value among the embodiment.The 4th measurement section is corresponding to the state counter among the embodiment.The 4th measured value is corresponding to the state counter value among the embodiment.
Measuring process is corresponding to FMT location counter, Data Receiving counter, write the processing of block counter and state counter.Controlled step is handled corresponding to the write command among the embodiment.
Can easily the disk controller according to described a plurality of embodiment be applied to memory storage, improve its performance thus.The example of memory storage comprises disc driver, CD drive, magneto optical driver or the like.
Claims (20)
1. memory storage that can receive the request that write from external unit, this memory storage comprises:
First measurement section, it measures first measured value relevant with the head position on the track of recording medium;
Second measurement section, it measures second measured value relevant with the data volume that writes request msg that is received, and the said write request msg is the data that are included in from the said write request of described external unit; And
Control part, its described first and second measured values based on described first measurement section and the measurement of second measurement section are controlled the data write operation to described track.
2. memory storage according to claim 1, wherein
Described first measured value represented to the data volume that current head position can write by the position from the top that will write the said write request msg on the described track, and
Described second measured value is represented by the data volume of the reception among the said write request msg.
3. memory storage according to claim 2, wherein
Under the situation of described first measured value less than described second measured value, described control part writes at carrying out corresponding to the said write request msg of described head position.
4. memory storage according to claim 1, wherein
Described data volume is represented by piece.
5. memory storage according to claim 1, wherein
When determining the said write of said write request msg finished, described control part is finished at the said write processing of request to described external unit notice.
6. memory storage according to claim 4, this memory storage also comprises:
The 3rd measurement section, it measures the 3rd measured value, and described the 3rd measured value is the piece number that writes request msg that has write, wherein
Described control part will indicate described first measured value of the position that begins to carry out said write to be stored as beginning first measured value, and, fashionable to writing of continuous blocks when interrupting based on described first and second measured values, described the 3rd measured value of measuring based on described beginning first measured value and described the 3rd measurement section is determined the position that next will write described data on the described recording medium.
7. the storage apparatus control method of a control store device, described memory storage can receive from external unit write request, and described control method comprises:
Measuring process, the second relevant measured value of the data volume that writes request msg that it is measured the first relevant measured value of head position on the track with recording medium and measurement and is received, the said write request msg is the data that are included in from the said write request of described external unit; And
Controlled step, it controls data write operation to described track based on measured described first and second measured values of described measuring process.
8. one kind to receiving the control device that the memory storage of the request that writes is controlled from external unit, and described control device comprises:
First measurement section, it measures the first relevant measured value of head position on the track with recording medium;
Second measurement section, it measures second measured value relevant with the data volume that writes request msg that is received, and the said write request msg is the data that are included in from the said write request of described external unit; And
Control part, its described first and second measured values of measuring based on described first and second measurement section are controlled the data write operation to described track.
9. control device according to claim 8, wherein
Described first measured value represented to the data volume that current head position can write by the position from the top that will write the said write request msg on the described track, and
Described second measured value is represented by the data volume that is received among the said write request msg.
10. control device according to claim 9, wherein
Under the situation of described first measured value less than described second measured value, described control part writes at carrying out corresponding to the said write request msg of described head position.
11. control device according to claim 8, wherein
Described data volume is represented by piece.
12. control device according to claim 8, wherein
When the said write determining to have finished to the said write request msg, described control part is finished at the said write processing of request to described external unit notice.
13. control device according to claim 11, this control device also comprises:
The 3rd measurement section, it measures the 3rd measured value as the piece number that writes request msg that has write, wherein
Described control part will indicate described first measured value of the position that said write begins to be stored as beginning first measured value, and, fashionable to writing of continuous blocks when interrupting based on described first and second measured values, described the 3rd measured value of measuring based on described beginning first measured value and described the 3rd measurement section is determined the position that next will write data on the described recording medium.
14. control device according to claim 11, this control device also comprises:
The 4th measurement section, it measures the 4th measured value of the piece number that has been write continuously as the initial beginning from the said write request msg, wherein
Under measured described the 4th measured value of described the 4th measurement section became situation greater than the piece number of being asked, described control part was determined writing of said write request msg finished, and the piece number of wherein said request is the piece number of said write request msg.
15. control device according to claim 14, wherein
The corresponding data buffer of quantity of the piece that writes continuously that described control part release and described the 4th measurement section are measured.
16. control device according to claim 11, this control device also comprises:
Writing information storage part, its storage indicate whether to finish the information that writes at each piece in the said write request msg, wherein
Based on the described information that is stored in the said write information storage part, described control part is not carried out the piece that has write and is write.
17. control device according to claim 11, wherein
Receive at described control device and a plurality ofly to write request and described a plurality of physical address that writes request is under the continuous situation, described control part will be included in described a plurality of data organization that writes in the request and be one and write request msg.
18. control device according to claim 17, wherein
Described control device finishes at the said write processing of request to described external unit notice according to described a plurality of orders that write the said write request in the request.
19. control device according to claim 8, wherein
Cross under the situation of a plurality of tracks in the position that will write the said write request msg on the described recording medium, described first measurement section is crossed over described first measured value of described a plurality of orbit measurement.
20. control device according to claim 8, wherein
Cross under the situation of a plurality of tracks in the position that will write the said write request msg on the described recording medium, described second measurement section is at described second measured value of each orbit measurement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006266515 | 2006-09-29 | ||
| JP2006266515A JP2008084507A (en) | 2006-09-29 | 2006-09-29 | Storage device, storage device control method, and control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101154417A true CN101154417A (en) | 2008-04-02 |
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Family Applications (1)
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|---|---|---|---|
| CNA2007101038241A Pending CN101154417A (en) | 2006-09-29 | 2007-05-16 | Storage apparatus, storage apparatus control method, and control apparatus |
Country Status (4)
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| US (1) | US20080082742A1 (en) |
| JP (1) | JP2008084507A (en) |
| KR (1) | KR100899826B1 (en) |
| CN (1) | CN101154417A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10643707B2 (en) * | 2017-07-25 | 2020-05-05 | Western Digital Technologies, Inc. | Group write operations for a data storage device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963962A (en) * | 1995-05-31 | 1999-10-05 | Network Appliance, Inc. | Write anywhere file-system layout |
| JP2001209500A (en) * | 2000-01-28 | 2001-08-03 | Fujitsu Ltd | Disk device and read/write processing method threof |
| JP2007501482A (en) * | 2003-08-04 | 2007-01-25 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Apparatus and method for recording data blocks |
| US7424497B1 (en) * | 2005-01-27 | 2008-09-09 | Network Appliance, Inc. | Technique for accelerating the creation of a point in time prepresentation of a virtual file system |
| US7769723B2 (en) * | 2006-04-28 | 2010-08-03 | Netapp, Inc. | System and method for providing continuous data protection |
-
2006
- 2006-09-29 JP JP2006266515A patent/JP2008084507A/en not_active Withdrawn
-
2007
- 2007-04-18 US US11/788,303 patent/US20080082742A1/en not_active Abandoned
- 2007-04-25 KR KR1020070040314A patent/KR100899826B1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| US20080082742A1 (en) | 2008-04-03 |
| KR20080029738A (en) | 2008-04-03 |
| KR100899826B1 (en) | 2009-05-27 |
| JP2008084507A (en) | 2008-04-10 |
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